Author: Pedro Lobo
Date: 2025-04-08T09:50:48+01:00
New Revision: bb5006169f9f72a87b4358356976e0fa33353728

URL: 
https://github.com/llvm/llvm-project/commit/bb5006169f9f72a87b4358356976e0fa33353728
DIFF: 
https://github.com/llvm/llvm-project/commit/bb5006169f9f72a87b4358356976e0fa33353728.diff

LOG: [CodeGen] Change placeholder from `undef` to `poison` (#134731)

Fill default values of a map with `poison` instead of `undef`. There
should be no functional difference as the default values are overridden
later.

Added: 
    

Modified: 
    clang/lib/CodeGen/MicrosoftCXXABI.cpp

Removed: 
    


################################################################################
diff  --git a/clang/lib/CodeGen/MicrosoftCXXABI.cpp 
b/clang/lib/CodeGen/MicrosoftCXXABI.cpp
index ba5f74f153d59..7bef436302526 100644
--- a/clang/lib/CodeGen/MicrosoftCXXABI.cpp
+++ b/clang/lib/CodeGen/MicrosoftCXXABI.cpp
@@ -370,7 +370,7 @@ class MicrosoftCXXABI : public CGCXXABI {
     MicrosoftVTableContext &VTContext = CGM.getMicrosoftVTableContext();
     unsigned NumEntries = 1 + SrcRD->getNumVBases();
     SmallVector<llvm::Constant *, 4> Map(NumEntries,
-                                         llvm::UndefValue::get(CGM.IntTy));
+                                         llvm::PoisonValue::get(CGM.IntTy));
     Map[0] = llvm::ConstantInt::get(CGM.IntTy, 0);
     bool AnyDifferent = false;
     for (const auto &I : SrcRD->vbases()) {


        
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